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      Question

      Train A running at a speed of 31 km/hr crosses train B

      in 20 seconds. Find the speed of train B (in km/hr), if the sum of the length of train A and B is 250 meters and both trains running in the opposite direction.
      A 19 km/hr Correct Answer Incorrect Answer
      B 13 km/hr Correct Answer Incorrect Answer
      C 20 km/hr Correct Answer Incorrect Answer
      D 14 km/hr Correct Answer Incorrect Answer
      E 24 km/hr Correct Answer Incorrect Answer

      Solution

      Let speed of train B be β€˜x’ km/hr. According to question, => 20(31 + x) Γ— (5/18) = 250 => 620 + 20x = 900 => 20x = 280 => x = 14 km/hr

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